arm64: xilinx: Enable generic of_board_dtb

Modify the configuration naming to be generic to xilinx rather than
specific to Versal. The offset value is different for Zynq and ZynqMP
to avoid overlapping with FSBL.

Signed-off-by: Ibai Erkiaga <ibai.erkiaga-elorza@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/xilinx/common/board.c b/board/xilinx/common/board.c
index f66973b..1c28263 100644
--- a/board/xilinx/common/board.c
+++ b/board/xilinx/common/board.c
@@ -40,7 +40,7 @@
 #if defined(CONFIG_OF_BOARD)
 void *board_fdt_blob_setup(void)
 {
-	static void *fw_dtb = (void *)CONFIG_VERSAL_OF_BOARD_DTB_ADDR;
+	static void *fw_dtb = (void *)CONFIG_XILINX_OF_BOARD_DTB_ADDR;
 
 	if (fdt_magic(fw_dtb) != FDT_MAGIC) {
 		printf("DTB is not passed via %p\n", fw_dtb);